Rockcastle County, Kentucky (Formed 1810) Land Area Year Population (sq.mi) Density 2010 17,056 316.5 53.9 2000 16,582 317.5 52.2 1990 14,803 317.5 46.6 1980 13,973 317.5 44.0 1970 12,305 317.5 38.8 1960 12,334 317.5 38.8 1950 13,925 317.5 43.9 1940 17,165 317.5 54.1 1930 15,149 317.5 47.7 1920 15,406 317.5 48.5 1910 14,473 310.0 46.7 1900 12,416 308.0 40.3 1890 9,841 308.0 32.0 1880 9,670 312.1 31.0 1870 7,145 312.1 22.9 1860 5,343 311.2 17.2 1850 4,697 409.7 11.5 1840 3,409 386.4 8.8 1830 2,865 386.4 7.4 1820 2,249 439.9 5.1